10results about How to "Improve wear performance" patented technology

The invention discloses a preparation method of a basalt short fiber (BF) oriented reinforced rubber composite material. The method comprises the following steps: 1) pretreating BF; 2) proportionally weighing BF and other raw materials, and sequentially adding the BF and other raw materials into an internal mixer for mixing; and (3) after uniformly mixing, carrying out open milling and sheet discharging, and carrying out performance test after carrying out calendering orientation vulcanization on the obtained rubber material along the BF direction. The composite material comprises the following components in parts by mass: SCR5: 85; 15 parts of BR; 0.3 part of CTP (Cellulose Triphosphate); n234: 43; dZ: 1.8; bF: 3 is firstly treated; s: 1; and after the two-stage mixing, the rubber material is subjected to calendering orientation along the BF direction and is vulcanized along the orientation direction. The pre-treated BSF is treated by using a sodium stearate method, so that the physical and mechanical properties of the composite material are relatively good, the pre-treated BF after pretreatment is relatively high in lipophilicity and relatively good in compatibility with a rubber matrix, and the comprehensive performance of the modified BF after being matched with latex and the like is relatively high.

The application provides a laser impact combined surface modification method for a bearing raceway surface, a pre-processing raceway region and a retainer matching surface, the raceway region reserving a processing allowance layer; a constraint layer is applied to the raceway region; the raceway region is micro-scale laser impact strengthened for at least 3 times without an absorption protective layer, a deep and uniform plastic strengthening layer is formed; the processing allowance layer is removed; an absorption protective layer is attached to the retainer matching surface; and array-arranged oil storage pits are formed on the retainer matching surface through laser impact forming. The method can form a plastic strengthening layer on the raceway region surface through micro-scale laser impact strengthening, can significantly improve the rolling contact fatigue performance and wear performance of the bearing, and can form oil storage pits on the retainer matching surface through laser impact forming, the oil storage pits can lock lubricating oil through the surface tension of the oil, and the problem of insufficient lubrication of the bearing raceway surface is solved.

The present invention discloses a magnetic rare earth friction material whose friction coefficient changes in the same direction as temperature, comprising the following components: 15-30% paramagnetic rare earth material, 15-25% fiber, 4-8% resin, 10-20% friction adjustment material, 8-15% graphite, and 20-30% filler; its preparation steps are: mixing, hot pressing, heat treatment, and size processing. The present invention adopts a paramagnetic rare earth material, and a combination of a fiber material, a high temperature resistant resin, a friction adjustment material, a lubricating material, and a filling material for pressing and forming; according to the principle that the magnetic susceptibility of the paramagnetic rare earth material is inversely proportional to the temperature, when the temperature of the paramagnetic rare earth material rises, the magnetic susceptibility decreases, the lubricity decreases, and the friction coefficient of the material increases, thereby achieving the change of the friction coefficient in the same direction as temperature; the overall performance of the friction material is adjusted by resin, friction adjustment material, graphite, and filler, so that it has good friction performance, mechanical performance, and physical performance, thereby ensuring the effectiveness, safety, and stability of the braking function.

The utility model provides high-breathability waterproof Teflon cloth which comprises a Teflon cloth body, the front end of the Teflon cloth body is fixedly connected with a breathable waterproof layer, the breathable waterproof layer is made of aramid fiber materials, and the design solves the problems that in an original device, the Teflon cloth body is relatively soft, and under the condition of high stress or frequent friction, the Teflon cloth body is not prone to falling off. The teflon cloth body is worn or torn, the teflon cloth body can provide certain air permeability, but compared with natural fiber, the air permeability is still limited, a wearer may feel stuffy and moisture is not easy to discharge during high temperature or strenuous exercise, and the teflon cloth is reasonable in structure, good in practicability and convenient to use. When the Teflon cloth body is worn or torn, the breathable waterproof layer and the wear-resistant cloth can improve the pulling resistance and wear resistance of the tensile net, and the micropores in the surface of the tensile net can prevent liquid water from permeating, so that the Teflon cloth has a good breathable effect and also has a breathable effect.

The present utility model relates to the technical field of tires, and provides a tire with high wet grip performance throughout its life cycle, including: a carcass; the crown part of the carcass sequentially has an inner liner layer, a ply layer, a belt layer, a chafe layer, a second tread rubber, and a first tread rubber from bottom to top; multiple main drainage grooves are longitudinally distributed on the first tread rubber and the second tread rubber; multiple transverse grooves are provided on the first tread rubber and the second tread rubber. The present utility model adopts a double-tread rubber structure and a deep groove design for the main drainage grooves, which can improve the wear resistance and wet grip performance of the tires, achieve high wet grip performance and drainage efficiency throughout the life cycle, and extend the service life of the tires.

The invention discloses a carbon-ceramic brake disc and a preparation method thereof, and relates to the technical field of carbon-ceramic brake discs. Plain cloth is used for replacing non-woven cloth, the strength of a structural part is improved, on the other hand, a friction layer adopts a tire net, the defect that the non-woven cloth on a friction surface is prone to falling off is overcome, the fiber content of the tire net is greatly reduced, and the friction surface is protected. Hydroxyl magnesium silicate with excellent wear resistance is prepared, then hydroxyl magnesium silicate and porous molybdenum disulfide are compounded, and ferroferric oxide is loaded on a porous molybdenum disulfide-hydroxyl magnesium silicate compound by adding ferric trichloride and ferric chloride tetrahydrate, so that the wear resistance of the material is improved, and the wear resistance of the material is improved. And the strength and wear resistance of the carbon-ceramic brake disc are further improved.

The invention relates to a preparation method of a copper-doped DLC (diamond-like carbon) film based on magnetron sputtering, and belongs to the technical field of preparation of diamond-like carbon films. By designing a special splicing target with a copper-carbon ratio of 1: 3, and combining accurate adjustment of a sample relative to a target material placing position before film coating and gradient control of acetylene introduction flow in a DLC film preparation stage, the copper-doped DLC film is prepared; a multi-dimensional synergistic copper doping content regulation and control mechanism is formed, the copper doping content can be flexibly, accurately and repeatedly adjusted within the range of 2.5 at%-9.1 at%, the problem of target poisoning easily caused by introduction of precursor gas such as acetylene when metal-doped DLC is prepared through a traditional magnetron sputtering technology is effectively solved, and the metal-doped DLC prepared through the magnetron sputtering technology is high in yield and good in stability. Meanwhile, the technical defects that in the process of preparing the DLC through pure carbon target sputtering, the hydrogen content of the film is too low, and the film cannot adapt to the nitrogen working condition are overcome, the prepared copper-doped DLC film is a-C: H type, the hydrogen content meets the nitrogen environment use requirement, and the copper-doped DLC film can be well applied to the friction lubrication scene under the nitrogen working condition.

The invention provides a laser three-dimensional forming preparation method for preparing a gradient reinforced composite material turbine blade of a gas turbine. The method comprises the following steps: ball-milling and mixing nickel-based alloy, nano silicon carbide and boron carbide powder according to a mass ratio of (92-96): (2-4): (2-4); a laser three-dimensional forming technology is adopted, a three-section gradient structure of a non-strengthening area (pure nickel base alloy), a transition area (gradient mixing) and a strengthening area (composite material) is constructed in the root-tip direction of the blade through a two-way powder feeding system, and near-net forming of the functional gradient strengthening turbine blade with the ceramic strengthening phase strengthening at the tip end of the blade and the root part maintaining toughness is achieved. The prepared turbine blade of the gas turbine has excellent high-temperature creep resistance, fatigue resistance, corrosion resistance and wear resistance, works for a long time in severe environments such as high temperature, high pressure, wear and corrosive media, has excellent high-temperature creep damage resistance, low-cycle fatigue damage resistance, corrosion damage resistance and friction damage resistance, and can effectively prolong the service life of the gas turbine.

The utility model discloses a kind of oil cylinders with protective structure, including oil cylinder main body, mobile piston, piston rod and cylinder cover, the outer end fixed mounting of oil cylinder main body has protective sleeve, the inner wall fixed mounting of oil cylinder main body has heat insulating layer;The lower positioning piece is fixedly installed on the upper end of the oil cylinder main body, the fastening ring is threadedly connected with the outer curved surface of the lower end of the lower positioning ring, the flexible bellow is extruded and adhered to the lower end of the fastening ring, the upper positioning piece is fixedly installed on the outer curved surface of the upper end of the piston rod, the positioning column is fixedly installed on the upper end of the upper positioning piece, the clamping piece is movably connected with the outer curved surface of the positioning column, the limiting ring is fixedly installed on the upper end of the positioning column, the supporting spring is fixedly installed on the lower end of the limiting ring, the flexible bellow upper end inside extrusion is adhered between the clamping piece and the upper positioning piece.The utility model greatly improves the protection performance of oil cylinder main body, prolongs the service life of oil cylinder main body.

The utility model relates to agricultural machinery material blocking accessory technical field, concretely is a straw pulverizer feed inlet material blocking device, including pulverizer and transmission structure, still include having discharge gate and feed inlet, the outer wall of feed inlet is fixedly connected with material blocking unit, material blocking unit includes support frame, material blocking subassembly and adjusting assembly, material blocking subassembly is used for the initiative adjustment of feed inlet angle size, adjusting assembly is used for the fixed and buffer of feed inlet in work, this straw pulverizer feed inlet material blocking device, the device passes through the material blocking subassembly and adjusting assembly of turnover, according to the dynamic adjustment of straw thickness material blocking angle and retreat amplitude, thick straw is not easy to open material blocking board leakage, thin straw is not easy to jam, make the device when carrying out the pulverization of different size straw, the pulverization effect is better, increases its stability, reduces its failure rate, increases its service life, is suitable for long -term stable material blocking operation.